4–2
Troubleshooting
Start
System Unit
Plugged In?
Plug In System Unit to
a Live ac Outlet.
No
Yes
Check ac Outlet Power:
90–132 V ac for
100/120 V Environ-
ments
198–264 V ac for
220/240 V Environ-
ments
Is Fan
Running?
Replace:
1. Power Supply Board
2. Fan
Replace LED.
Yes
No
Figure 4–1. LED Not Lit